How accurate are the Set & Forget systems?

[Ashcan Bill]

Jordan - I have hygrometers on the top and middle shelf of my Aristocrat. While there's a RH differential between the two shelves, the readings themselves never change. Doesn't matter if it's summer (when the cooling system kicks in fairly often) or winter. The temperature and RH stays rock constant.

I'm not sure if the controller is accurate in the reading it displays or not, because I originally adjusted everything based on "feel" rather than what any of the hygrometers said. I don't worry much about the numbers. But once I got things acclimated to where I wanted it, it's never changed. Also I have one of the older LCD controllers, not the newer LED one (not that it should matter). It's a great system.